mirror of
https://github.com/LadybirdBrowser/ladybird.git
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152 lines
4.8 KiB
C++
152 lines
4.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "QSWidget.h"
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#include <AK/URL.h>
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#include <LibCore/MimeData.h>
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#include <LibGUI/MessageBox.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/Bitmap.h>
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QSWidget::QSWidget()
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{
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set_fill_with_background_color(true);
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set_background_color(Color::Black);
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}
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QSWidget::~QSWidget()
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{
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}
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void QSWidget::set_bitmap(NonnullRefPtr<Gfx::Bitmap> bitmap)
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{
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m_bitmap = move(bitmap);
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}
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void QSWidget::relayout()
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{
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Gfx::Size new_size;
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float scale_factor = (float)m_scale / 100.0f;
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new_size.set_width(m_bitmap->width() * scale_factor);
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new_size.set_height(m_bitmap->height() * scale_factor);
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m_bitmap_rect.set_size(new_size);
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update();
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}
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void QSWidget::resize_event(GUI::ResizeEvent& event)
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{
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relayout();
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GUI::Widget::resize_event(event);
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}
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void QSWidget::paint_event(GUI::PaintEvent& event)
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{
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect());
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}
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void QSWidget::mousedown_event(GUI::MouseEvent& event)
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{
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if (event.button() != GUI::MouseButton::Left)
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return;
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m_pan_origin = event.position();
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m_pan_bitmap_origin = m_bitmap_rect.location();
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}
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void QSWidget::mouseup_event(GUI::MouseEvent& event)
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{
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UNUSED_PARAM(event);
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}
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void QSWidget::mousemove_event(GUI::MouseEvent& event)
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{
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if (!(event.buttons() & GUI::MouseButton::Left))
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return;
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auto delta = event.position() - m_pan_origin;
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m_bitmap_rect.set_location(m_pan_bitmap_origin.translated(delta));
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update();
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}
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void QSWidget::mousewheel_event(GUI::MouseEvent& event)
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{
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auto old_scale = m_scale;
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auto old_scale_factor = (float)m_scale / 100.0f;
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auto zoom_point = event.position().translated(-m_bitmap_rect.location());
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zoom_point.set_x((float)zoom_point.x() / old_scale_factor);
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zoom_point.set_y((float)zoom_point.y() / old_scale_factor);
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m_scale += -event.wheel_delta() * 10;
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if (m_scale < 10)
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m_scale = 10;
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if (m_scale > 1000)
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m_scale = 1000;
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relayout();
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auto new_scale_factor = (float)m_scale / 100.0f;
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auto scale_factor_change = new_scale_factor - old_scale_factor;
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m_bitmap_rect.move_by(-Gfx::Point((float)zoom_point.x() * scale_factor_change, (float)zoom_point.y() * scale_factor_change));
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if (old_scale != m_scale) {
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if (on_scale_change)
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on_scale_change(m_scale);
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}
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}
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void QSWidget::set_path(const String& path)
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{
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m_path = path;
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}
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void QSWidget::drop_event(GUI::DropEvent& event)
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{
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event.accept();
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window()->move_to_front();
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if (event.mime_data().has_urls()) {
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auto urls = event.mime_data().urls();
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if (urls.is_empty())
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return;
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if (urls.size() > 1) {
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GUI::MessageBox::show("QuickShow can only open one file at a time!", "One at a time please!", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
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return;
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}
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auto url = urls.first();
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auto bitmap = Gfx::Bitmap::load_from_file(url.path());
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if (!bitmap) {
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GUI::MessageBox::show(String::format("Failed to open %s", url.to_string().characters()), "Cannot open image", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
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return;
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}
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m_path = url.path();
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m_bitmap = bitmap;
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m_scale = 100;
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if (on_scale_change)
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on_scale_change(m_scale);
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relayout();
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m_bitmap_rect.center_within(rect());
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}
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}
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